長江源區(qū)土地利用/覆蓋現(xiàn)狀及成因分析

時間：2023-04-25 20:35:01 環(huán)境保護論文我要投稿

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摘要： 以地形圖、TM影像為主要信息源,利用遙感和GIS的空間分析技術對長江源區(qū)的土地利用/覆蓋現(xiàn)狀進行研究.在此基礎上分析土地利用現(xiàn)狀特征的形成原因.研究結果表明,長江源區(qū)草地面積為 8 377 079.3 hm~2,占研究區(qū)面積的58.9%,其中高覆蓋度草地、中覆蓋度草地、低覆蓋度草地分別占研究區(qū)面積的10.28%、21.36%、27.23%;未利用土地面積為 4 595 112.1 hm~2,占研究區(qū)面積的32.3%,其中沙地、戈壁、鹽堿地、沼澤地、裸土地、裸巖石礫地、高寒荒漠分別占研究區(qū)面積的3.66%、5.80%、0.25%、4.19%、2.24%、6.28%、9.88%;其次為水域、林地、耕地、城鄉(xiāng)工礦居民用地,分別占研究區(qū)面積的7.2%、1.6%、0.01%、0.004%. Abstract： The status of land use/land cover in the source regions of the Yangtze River was studied by using the techniques of remote sensing and the geographical information system based on the information resources of TM images in 2005 and relief maps. The results show that the grassland area was 8 377 079.3 hm~2, occupying 58.9% of the total source area, in which the high coverage grassland, moderate coverage grassland and low coverage grassland occupied 10.28%, 21.36%, 27.23% of the total source area, respectively;the unused land area was 4 595 112.1 hm~2, occupying 32.3% of total area, in which sand land, gobi desert, saline land, marshland, bare land, bare rock and cold desert occupied 3.66%, 5.80%, 0.25%, 4.19%, 2.24%, 6.28%, 9.88%, respectively;the water area, forestry land, farmland, residential land occupied 7.2%, 1.6%, 0.01%, 0.004% of the total area, respectively. At last, the reasons for this status was also analyzed. 作者：逯軍峰董治寶胡光印顏長珍宋翔魏振海 LU Jun-feng DONG Zhi-bao HU Guang-yin YAN Chang-zhen SONG Xiang WEI Zhen-hai 作者單位：中國科學院,寒區(qū)旱區(qū)環(huán)境與工程研究所,沙漠與沙漠化重點實驗室,甘肅,蘭州,730000 期刊：中國沙漠 ISTICPKU Journal： JOURNAL OF DESERT RESEARCH 年，卷(期)： 2009, 29(6) 分類號： X87 關鍵詞：長江源區(qū) 土地利用/覆蓋遙感 Keywords： source regions of the Yangtze River land use and land cover remote sensing

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